How to Change CPU Casing
The part of the computer that encases the CPU, which is more accurately referred to as the CPU heatsink, is a good part to replace or at least clean every few years. You may also want to upgrade your CPU heatsink if you are overclocking your processor or if your computer is giving you warnings that your CPU is overheating. The exact procedure for replacing your heatsink will vary, depending on your specific computer, but most heatsink replacement should be straightforward.
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Instructions
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Power off the computer and remove the power cord from the wall. Remove the side panel of the computer. You may need a screwdriver for this step depending on the design of your computer case.
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2
Locate the cable running from the fan on top of the CPU to the power box. Disconnect it.
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3
Remove the fan from the heatsink, if your heatsink and fan are two separate devices. One common design is four screws on the four corners of the fan, screwing down into the heatsink. Remove such a fan by unscrewing the four screws from the heatsink below. On some computers, the heatsink and fan may be one unit.
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4
Remove the latches or screws holding the heatsink in place. Again, the exact design will vary, depending on the specific computer, but take some time to inspect the heatsink and you should be able to identify how the heatsink is kept in place. One common design is two metal latches on either side of the heatsink.
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Apply thermal grease, or thermal adhesive, if your CPU heatsink manufacturer recommends it. Check the manual for your new heatsink to determine this.
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Replace the latches that secure the heatsink in place. Replace the CPU fan, and reconnect its power cord. Replace the side panel of the computer case, and plug the computer back in.
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References
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